Non-overflow pump.



PATENTED FEB. 19, 1907.

B. G. FOSTER. NON-OVERPLOW PUMP.

APYLIOATION FILED APR.17, 1906.

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B. G. FOSTER. NDN-OVBRFLOW PUMP.

APPLICATION rum) APB.17,1906.

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PATENTED FEB. 19, 1907.

B. G. POSTER.

NON-OVERFLOW PUMP. APPLICATION FILED APR.17,1906.

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PATENTED FEB. 19, 1907.

B. G. POSTER. NON-OVBRFLOW PUMR. APPLICATION FILED APR.17,1906.

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UNITED STATES PATENT OFFICE.

BERTRAM G. FOSTER, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THE DELPHOS MANUFACTURING COMPANY, A CORPORATION OF OHIO.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed April 17, 1906. Serial No. 312,243.

lb (LZZ whom it may concern- Be it known that I, BEn'rnAM G. Fosrnn, a citizen of the United States, residing at \Vashington, District of Columbia, have invented certain new and useful Improvements in Non-Overflow Pumps, of which the following is a specification.

This invention relates to improvements in cans or reservoirs particularly intended for household purposes and for filling lamps without overflowing the same, though the invention is not restricted to such use, as will be evident to those skilled in the art to which said invention a pertains.

More especial y, the invention has relation to that type of can in which a pump orpumps are employed for discharging'liquid; and the prime object is to provide simple means of a novel nature whereby surplus liquid will be returned to the can or reservoir from the receiving vessel and the overfilling of the latter, withits resultant disagreeable features, thereby avoided.

It is believed to be unnecessary to more particularly set forth the objects at this time, as the same will be clearly realized when the nature and operation. of the invention is understood. For such an understanding attention is invited to the accompanying drawings, wherein several embodiments of said. invention are illustrated, and to the. followin description of the same.

otwithstanding the several forms of the construction shown the said invention is not limited to the same, but is open to further changes and modifications within the scope of the claims hereto appended.

In the said drawings, Figure 1 is a W rlical sectional view through a can, showing a pump in elevation therein. Fig. 2 is a vcr tical sectional view through the pump. Fig. 3 is a sectional view in outline, showing a slight modification of Fig. 2. Fig. 4 is a vertical sectional view of another modification Fig. is a vertical sectional view of a simple form of pump. Figs. 6 and 7 are detail sc 0- tional views through the same, indicating the operation thereof. Fig. 8 is another detail sectional view of a still simpler form, and Fig. 9 is another detail sectional view of still another modification.

While the probably preferred form is illustrated in Figs. 1 and 2, in order that the nature of the invention may be more clearly untime cause the valve 24 to cover derstood attention is invited to the embodiment illustrated in Figs. 5, 6, and 7. As therrin shown, a pump-barrcl 10 is employed, within which operates the usual piston or plunger 11, suitably attachrd to the lower end of a pis'tonrod 12, that operates longitudinally in the barrel and is providrd its upper end with a handle 13. The lower end of the barrel 10 has a bottom 14, provided with a central opening 15, and above said bottom is located a partition 16, having another opening 17 therethrough. In the compartment formed by the bottom and the partition is arrangrd a valve 15, having upstanding lcgs 19. This valve will thus close the opening of the bottom, but cannot close the opening 17. The result is a alved inlet to the pump cylinder or barrel. The discharge from the pump is through an ofl set. outlet 20, having an opening 21 in its top, which opening communicates with the interior of a valve-easing 2" located directly over the outlet 20. The top of the casing 22 has what may be termed a siphon-outlet 23. A valve 24, located in LllO casing 22, adapted. to altrrnatcly close the discliargr-opcning 21 and the siphon-outlet 23, the latter being preferably of greater diameter than the former, for the reasons hereinafter given. From the valve-casing, preferably at one side, leads a combined discharge and siphon return pipe comprising a lower section 25, rigidly attached to the casing 22, and an upper section 26, slidably telescoped over the section 25 and having a downturned spout 27 at its upper end that constitutes the short arm of a siphon. The operation of" this pump will, it thought, he clearly apparent by referring to Figs. 6 and 7. Assuming the same within an oil-can, it will be apparent that when the plunger is elevated, as indicated in Fig. 6, the lower valve 18 will be raised and the liquid will pass through the inlet into the barrel below the plunger. This upward movement of the plunger will at the same the outletopcning 21, prohibiting the suction of air downwardly through the (.lischargc-pipc. After the plunger has reached the upper end of its stroke it is forced downwardly. This, as indicated in Fig. 7, will cause the lower valve 18 to close the inlet-opening 15 in the bottom of the barrel, and the liquid will thereupon 'lind an escape through the outlet 20 and opening 21 Forcing the valve 24 over the siphon-outlet 23. Censor uently' the saidliq uid will pass through the discharge pipe into a receiving vessel into which the spout 27 has been introduced. A continued reciprocation ol the plunger will thus cause an intermittent llow from the spout; but as soon as the level of the liquid in the receiving vessel reaches the lower end ol said spout a siphon action will take place while the plunger is being elevated. This, it is thought, will be clearly apparent, for upon the said upward movement the valve 24 will close the opening 21, thereby leaving the larger outlet 23 open. The long arm of the discharge-tube will of course be filled with liquid from the previous discharge of the pump, and thus overbalancing the shorter arm or spout, which is also iilled, will cause the return of the liquid until the siphon is broken by the lowering of the level in the receiving vessel below the lower end of said spout. The opening is therefore made of considerable size, so that the return-flow may be coinparatively rapid and all surplus liquid returned prior to the succeeding discharge of the pump.

A still simpler form of the invention is illustrated in Fig. 8. The portion of the pumpcylinder shown is designated 10, the reciprocating plunger or piston working therein 11 and the piston-rod which carries said piston is designated 12. The lower end of the barrel in this instance is closed and liquid is introduced as well as expelled therefrom through an ollsct passage-way 13 having an openin H in its top, which (queuing constitutes t 1e means of eonnnunication between the passage -way 1.3 and the interior of a valve-easing located directly above said passage-way. This valve-casing 15 has the siphon-discharge opening 16 in its top, which opening, as in the former instance, is greater in diameter than the lower opening 1.4 A valve 17, located in the casing 15*, is provided with depending legs 18. Said valve is of sullieient size to close the opening 16, but the legs prevent its stopping the passage of liquid through the opening 14*. From one side of the valve-casing leads the d ischarge and siphon rcturn-pipe 19, constructed the same as that already described. In this form of construction the upward movement of the plunger will draw the liquid through the openings 16 and let into the passageway 13, and thus to the interior of the barrel. Upon the downward movement of the plunger, however, the valve 17 is elevated, thereby closing the siphon-opening, so that the expelled liquid must of necessity pass through the discharge-pipe to the receiving vessel. This action is continued until the level of the liquid reaches the spout of the discharge-pipe, whereupon for the reasons already given in connection with the first-de scribed structure upon the elevation of the i l t l l plunger the liquid will be siphoned back to the interioroi' the can orrescrvoir, and this siphon action will, in fact, be assisted to some extent by the passage ol" the liquid that is drawn into the barrel through the valve-casing. In this connection the enlarged siphon-opening I6 is considered o'l' importance, for while the liquid must pass with considerable force through the opening 14* there will be but a sluggish movement through the larger opening. This will, to a great extent, avoid the danger of air being drawn down the discharge-[ape It) when the plunger is elevated, as su'llicient liquid can pass through the opening 16 to avoid abnormal suction in the valve-casing.

With this understanding of the simpler forms of the invention the COIIStFUCtiOIl which at present is-considered preferable namely, that illustrated in Figs. and 2--will be described.

The usual can or reservoir 10" is en'ploycd, and then in is susprnded single pun pbai rel 11'. Within tris pun'p-baiiel is slidably mounted a solid piston 12", secured to the lower end of a piston-rod 13%, that extrnds through the upper (nd oi the pun p and has an o'l'l'set hannle H. disposed exteiioily ol' the can or reservoir. The lower rnd oi the bairel 1]" has an efl'stt passage-way 15", through the top of which is toward an oprning 16 coinniuuic 1g with the interior cl a valve-easing 17*, which c: sing in s in its it p a siph .n ntlrt rnd liquid-ink t tpt'ning 18* of git ater (ilitilftfilf thin the optning 16". A valve 19", located within the using 17", is arranged to chse the cptning 18" upon the outward passige oi the liquid through the oprning 16, but has dcptnding legs which p. event its cltsing said oprning 16". To the side of the crsing 17" is attached an elbow 20*, terminating in an upright stationary section 21 of a liquid-discharge and siphon :ctuin pipe. At one side of the bar el 11 is located a conduit 22 extending limi a pr int a slight distance above the lower valvo-cr.s ing 17" to a point contiguous to the tcp ol' the barrel, an opening 23" being lornicd in one wall oi the barrel and constituting the means ol coinnuinicsticn betworn the conduit 22" and t .e intci ior oi the barrel above the plunger 1 The lower end of the conduit 22 is piovided with. an offset elbow 24 having an opening 25" in its top, which opening coinnunicatrs with the interior of another valveciising 26'. The top wall of said casing 26 has therethrough a siphon-outlet opening and liquid-inlet opening 27*, which opening, as in the picvious instances, is of greater diameter than the opening in the bottom oi the casing. A valve 28*, located in the easing 26*, is adapted to close the opening 27 but not the opening 25 From the side of this casing 26 extends the upright section 29 of another discharge and siphon return pipe. Sirirultaneously movable but independent sliding sections 30 are telescoped over the sections 21 and 29', said sections 30' terminating in independent depending spouts 31 With this structure a simulta neous return is obtained with each discharge, and at the same time a double-actioned discharge-purrtp is also secured. Thus assuming the nozzles introduced into a receiving vessel, as shown in Fig. 1, it will be seen that when the piston is elevated liquid will be drawn through the openings 18 and 16 into the lower portion of the barrel. When said piston descends, this liquid will be expelled through the pipe 21 into the receiving vrssel, the opening 18* being closed by the valve 19. The downward stroke of the piston at the same time eflects the induction of oil to the barrel above the same through the open ings 27 and 25 to the conduit 22'. Upon the succeeding elevation of the piston the latter liquid will in turn be forced through the other discharge- )ipe into the receiving vessel, while the lower portion of the barrel is once more being filled. The rrsult is an almost continuous discharge of liquid from the nozzle of the purrp, but as soon as the liquid reaches the level of the lower end of the same a return siphon action will be occurring through one pipe while the other pipe is discharging, this alternate action therefore amounting,in efl'ect, to a continuous discharge and return, as will be evident. Therefore not only is a quickalction pun p secured, but a more desirable return of the. lic uid is also obtained, as the vessel being filled does not have to receive practically the entire discharge of the pun p before the re turn siphon action begins. Practically the same effect is obtrinrd in the modification shown diagrammatically in Fig. 3, the only difference being that inlets independent oi' the siphon-outlets areerrployed. The barrel is shown at 10, the plunger 1 1 operating therein in the usual manner and being carried by a plunger-rod 12". A valved inlet 13 is formed in the bottom of the barrel, and a valved inlet-conduit 14 leads from the lower end oi said barrel to'the top of the same, where it has communication therewith. An outlet 15" communicates with a dischargepipe 16, which pipe term inatrs in the usual downturned spout 17. The outlet is controlled by a downwardly-opening valve 18, which valve also controls the siphon-discharge opening 19", formed above the same. A discharge-conduit 20" leads from the top of the barrel to the lower portion of the same, where a downwardly-opening valve 21" is located, this valve also controlling a siphcnoutlet 22", arranged above the sanre, which outlet, as well as the conduit 20, is in com- Inunicatien with another discharge-pipe 23, leading to another spout 24, arranged alongside the spout 17. In this case the liquid is drawn by the plunger through the inlets 13 and 14; but the discharge, as well as the siphon action, is substantially the same as that described in Fig. 2, so a detailed description thereof is therefore thought to be unnecessary, as the saire will be clearly apparent.

Referring now to still another embodimentnamely, that illustrated in Fig. 4it will be seen that the same idea is still involved as that described before, and particularly with relation to the embodiment illustrated in Figs. 1 and 2. In this instance, however, two separate barrels 10 and 11 are employed, within which operate pistons 12 secured to the lower ends of rods 13, which rods are joined at their upper ends and have secured thereto a common handle 14, so that the pistons will be simultaneously operated. The lower end of the barrel 10 has an offset discharge 15 leading to a valve-casing 16", having the siphon-discharge 17 in its top. The siphon-discharge is controlled by a valve 18. The discharge and siphon pipe is shown generally at 19 and is of the usual construction. The other barrel 11 has communication at its upper end with a conduit 20, extending to the lower end of said barrel, and having an offset 21 communicating with the valve-casing 22 which casing is provided in its top with the siphon-outlet and liquid-inlet opening 23 said opening being controlled by a valve 24 From the casing 22 leads another discharge and siphon return pipe 25. The action of this pump is similar to that of the pump illustrated in Figs. 1 and 2, and a reiteration thereof is con sequently thought to be unnecessary. The same advantageous results are secured. It also constitutes a double-actioned pump, effecting substantially a simultaneous flow, and at the same time a substantially simultaneous return. In view of the fact, however, that two pump-barrels and pistons are necessary the structure is not as simple as that illustrated in Figs. 1 and 2.

Finally, attention is asked to still another modification-namely, that shown in Fig. 9. The portion. of the barrel illustrated is designated 10", and operating therein is the plungel 11, connected to a piston or plunger-rod 1.2". The bottom of the barrel has an inlet opening 13*, and a partition located above the same has also an inlet and discharge opening 14 An inwardly-opening valve 15, located in the compartment formed by the partition and bottom, is arranged to close the opening l3 upon the expulsion of the liquid, but permits the ready ingress of said liquid. The discharge and siphon re turn pipe leads from the said valve-compartmen t, and at the lower end of its upright por tion it has a lateral siphon-discharge opening 17 A valve 18 located at said lower end, is so arranged that it will swing upwardly and outwardly upon the discharge of the liquid through the pipe to close the opening 17:

coi'inected to the cylinder and having an opening contiguous to its connection with the but when the piston is being elevated and l cylinder, and it valve controlling said openthe lower portion of the barrel lilled with liquid said valve will be drawn downwardl v, and thereby the siphon-oprming will be uncovered, while the return ol' liquid through the pipe into the pum will be prevented.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is"

l. The combination with a pump, of a combined discharge and siphon return pipe connected thereto, said pipe having a siphondischarge opening, and av valve controlling said siphon-discharge opening.

2. The combination with a pump, of a combined discharge and siphon return pipe connected thereto and having a plurality of discharge-openings, one of which is lower than the other, and means for controlling said lower discharge-opening.

3. The combination with a pump, of a combined discharge and siphon return pipe connected thereto and having a plurality ol discharge-openings, one of which is lower than the other, and an automatically-open atcd valve controlling said lower dischargeopening.

4. The combination with. a pump, of a combined discharge and siphon return pipe connected thereto and having a plurality of discharge-openings, one of which is lower than the other, and a valve located in the path of the discharge from the pump and operated thereby to close the lower opening.

5. The combination with a pump, of a combined discharge and return pipe connected thereto, said pipe having a siphondischar e opening between its ends, and means for controlling the passage of liquid therethrough.

6. The combination with a pump, of a combined discharge and return pipe connected thereto, said pipe having a depending discharge end and also having an opening located below the plane of the discharge end, and means for closing the opening.

7. The combination with a pump, of a combined discharge and return pipe connected thereto, said pipe having a depending discharge end and also having an opening located below the plane of the discharge end, and an automatic valve for closing the opening.

8. The combination with a pump including a cylinder, of a discharge and return pipe connected to the cylinder, said cylinder having a discharge-opening communicating with the pipe and said pipe having a dischargeopening substantially alined with the cylinder discharge-opening, and a valve interposed between the openings.

9. The combination with a pump including a cylinder, of a discharge and return pipe .l(). The combination with a pump, of a combined diselnirge and return siphon pipe connected thereto and having a siplum-discharge, and moms for closing the siphon-discharge during the discharge of liquid from the pump through said pipe.

ii. The combination with a pump, of a combined discharge and return siphon pipe eormected thereto and having a siphondischarge, and an autcn'iatic valve for closing the siplion-discharge during the discharge of liquid from the pump into the said pipe, said valve being operated by said discharge of liquid. 7

12. The combination with a pump, of a combined discharge and return pipe connected thereto and comprising sections, one of slid sectiuns being fixed to the pump and having a sipherr-discharge opening, the other being slidable on the first-me]itioned section and having a discllarge-opening.

11 The combiimtion with a pump, 01' a r'olllbil'ied discharge and return pipe connected thereto and comprising sections, one of slid sections being fixed to the pump and having a siphon-discharge opening contiguous to the juncture with the pump, the other being slidiible on the [irst-mentioned section and having .1 depending discharge end, and an automatic valve disposed in the path of movement oi the discharge from thepump and operating across the opening in the firstmentiJned section.

I l. The c:nnbin:ttion with a reservoir, of a pump liicitted therein and having a discharge, a combined discharge and return pipe connected to the pump and having communication with the discharge thereof, siid pipe having an opening disposed in substantial alinen'ient with stid discharge, and a valve interposed between the disclntrge and opening and automatically operating to close the litter upon the discharge of liquid from the pump, said pipe having a depending discharge end disposed cxteriorly of the reservoir.

A pump, comprising a cylinder, a piston, a tube leading from the cylinder and having an opening intermediate its ends for the discharge of returned. oil, and a valve controlling such opening.

1.6. A pump, comprising a cylinder, :1 plunger, a tube leading therefrom through which both an emission and siphoning of liquid is alternately efl'ected during an operation of the pump, said tube having an opening intermediate its ends for the discharge of siphoned liquid, and means for controlling said opening.

17. In a pump, a cylinder, a plunger, a

tube leading therefrom having a valve-chem her intermediate its ends rovided With a discharge-opening for sip oned liquid, and means for controlling the communication between the chamber and cylinder and the discharge through said opening.

18. The combination with a pump-cylinder, of a plunger operating therein, and a plurality of pi es connected to the cylinder on opposite si es of the plunger, each of said pipes comprisin a combined discharge and return pipe an having a plurality of discharge-openings, one of which is lower than the other and constitutes a siphon-discharge.

19. The combination With a pump-cylinder, of a plunger operating therein, and a plu rality of pipes connected to the cylinder on opposite sides of the plunger, each of said pipes comprisim a combined discharge and return pipe and having a plurality of discharge-openings, one of which is lower than pump-cylinder located therein, a reciproca 2 5 tory plunger operating in the cylinder, a plurality of pi es connected to the cylinder on opposite sides of the plunger, said pi es having depending discharge ends locate exteriorly oi the reservoir and having siphon-dis- 3o charge openings communicating With the intenor of said reservolr, and automatic valves controlling said siphon-discharge openings.

In testimony whereof I hereunto affix my signature in presence of two Witnesses.

BERTRAM G. FOSTER.

Witnesses:

Louis G. JULIHN, JAS. K. MCCATHRAN. 

